Migrate AboutActivity to viewpager2
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001914764a
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@ -8,16 +8,18 @@ import android.view.View;
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import android.view.ViewGroup;
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import android.widget.TextView;
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import androidx.annotation.NonNull;
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import androidx.appcompat.app.AppCompatActivity;
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import androidx.appcompat.widget.Toolbar;
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import androidx.fragment.app.Fragment;
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import androidx.fragment.app.FragmentManager;
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import androidx.fragment.app.FragmentPagerAdapter;
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import androidx.fragment.app.FragmentStatePagerAdapter;
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import androidx.viewpager.widget.PagerAdapter;
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import androidx.viewpager.widget.ViewPager;
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import androidx.lifecycle.Lifecycle;
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import androidx.recyclerview.widget.RecyclerView;
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import androidx.viewpager2.adapter.FragmentStateAdapter;
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import androidx.viewpager2.widget.ViewPager2;
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import com.google.android.material.tabs.TabLayout;
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import com.google.android.material.tabs.TabLayoutMediator;
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import org.schabi.newpipe.BuildConfig;
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import org.schabi.newpipe.R;
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@ -64,20 +66,20 @@ public class AboutActivity extends AppCompatActivity {
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"https://github.com/lisawray/groupie", StandardLicenses.MIT)
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};
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private static final int POS_ABOUT = 0;
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private static final int POS_LICENSE = 1;
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private static final int TOTAL_COUNT = 2;
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/**
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* The {@link PagerAdapter} that will provide
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* The {@link RecyclerView.Adapter} that will provide
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* fragments for each of the sections. We use a
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* {@link FragmentPagerAdapter} derivative, which will keep every
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* loaded fragment in memory. If this becomes too memory intensive, it
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* may be best to switch to a
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* {@link FragmentStatePagerAdapter}.
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* {@link FragmentStateAdapter} derivative, which will keep every
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* loaded fragment in memory.
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*/
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private SectionsPagerAdapter mSectionsPagerAdapter;
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/**
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* The {@link ViewPager} that will host the section contents.
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* The {@link ViewPager2} that will host the section contents.
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*/
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private ViewPager mViewPager;
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private ViewPager2 mViewPager;
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@Override
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protected void onCreate(final Bundle savedInstanceState) {
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@ -93,14 +95,25 @@ public class AboutActivity extends AppCompatActivity {
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getSupportActionBar().setDisplayHomeAsUpEnabled(true);
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// Create the adapter that will return a fragment for each of the three
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// primary sections of the activity.
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mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
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mSectionsPagerAdapter =
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new SectionsPagerAdapter(getSupportFragmentManager(), getLifecycle());
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// Set up the ViewPager with the sections adapter.
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mViewPager = findViewById(R.id.container);
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mViewPager.setAdapter(mSectionsPagerAdapter);
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final TabLayout tabLayout = findViewById(R.id.tabs);
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tabLayout.setupWithViewPager(mViewPager);
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new TabLayoutMediator(tabLayout, mViewPager, (tab, position) -> {
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switch (position) {
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default:
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case POS_ABOUT:
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tab.setText(R.string.tab_about);
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break;
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case POS_LICENSE:
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tab.setText(R.string.tab_licenses);
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break;
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}
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}).attach();
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}
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@Override
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@ -162,40 +175,30 @@ public class AboutActivity extends AppCompatActivity {
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}
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/**
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* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
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* A {@link FragmentStateAdapter} that returns a fragment corresponding to
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* one of the sections/tabs/pages.
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*/
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public class SectionsPagerAdapter extends FragmentPagerAdapter {
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public SectionsPagerAdapter(final FragmentManager fm) {
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super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
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public static class SectionsPagerAdapter extends FragmentStateAdapter {
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public SectionsPagerAdapter(final FragmentManager fm, final Lifecycle lifecycle) {
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super(fm, lifecycle);
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}
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@NonNull
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@Override
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public Fragment getItem(final int position) {
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public Fragment createFragment(final int position) {
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switch (position) {
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case 0:
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default:
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case POS_ABOUT:
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return AboutFragment.newInstance();
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case 1:
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case POS_LICENSE:
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return LicenseFragment.newInstance(SOFTWARE_COMPONENTS);
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}
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return null;
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}
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@Override
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public int getCount() {
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public int getItemCount() {
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// Show 2 total pages.
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return 2;
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}
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@Override
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public CharSequence getPageTitle(final int position) {
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switch (position) {
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case 0:
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return getString(R.string.tab_about);
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case 1:
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return getString(R.string.tab_licenses);
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}
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return null;
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return TOTAL_COUNT;
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}
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}
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}
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@ -30,7 +30,7 @@
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</com.google.android.material.appbar.AppBarLayout>
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<androidx.viewpager.widget.ViewPager
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<androidx.viewpager2.widget.ViewPager2
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android:id="@+id/container"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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